Patent US3676274A successfully refreshed from Google Patents.
US3676274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distortion-free mirror attached to a metallic holder
Assignee: United States Department of the Army
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Filing: 1970-05-29
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Granted: 1972-07-11
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Expires: 1990-05-29
Abstract
Abstract A METHOD FOR SECURING A MIRROR TO ITS METAL HOLDER BY THE USE OF AN ADHESIVE CONTAINING A PLURALITY OF SHIMS IMBEDDED THEREIN SO THAT THERE ARE ONLY POINT CONTACTS BETWEEN THE MIRROR AND SAID METAL HOLDER AND THE RESOLUTION OF THE MIRROR IS PRACTICALLY UNAFFECTED BY DISTORTION OF THE METAL HOLDER.
Inventors
- 👤 Albert J Matulis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:25
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/18; G02B7/182; B; B44; B44F; B44F1/00; B44F1/02; B44F1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |